Fixes issue where motion blur would not display for
certain objects intermittently due to uninitialized
parameters in the ObjectKey struct causing the
motion object map look-up to fail and for motion
parameters to be reset to default, disabling the
effect for the given objects.
Authored by Apple: Michael Parkin-White
Co-authored-by: Michael Parkin-White <mparkinwhite@apple.com>
Pull Request: https://projects.blender.org/blender/blender/pulls/117560
ac61dad14f